[CW] Railroad horn signals

[Bill William]

>...railroad 
train horns are usually blown in a "Q" pattern! Allegedly to indicate 
"Here comes the Queen".

There is a long-time set of railroad horn signals indicating various train movements and activities.  The "Q pattern" is used for grade crossings and is the one most people would hear regularly.  I suspect the signal pattern preceeded the Queen reference. Bill, W8FYO  		 	   		  
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